CN201339272Y

CN201339272Y - 1*3I low-relaxation pre-stress indented steel strand

Info

Publication number: CN201339272Y
Application number: CNU2008201449342U
Authority: CN
Inventors: 谢志钦; 谢志礼; 谢志杰
Original assignee: SILVERY DRAGON PC STEEL PRODUCTS GROUP CO Ltd TIANJIN
Current assignee: Tianjin Silvery Dragon Prestressed Materials Co., Ltd.
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-11-04
Anticipated expiration: 2018-12-26

Abstract

The utility model relates to a 1*3I low-relaxation pre-stress indented steel strand; a pre-stress steel wire in the steel strand adopts a refined torsion-less controlled cooling high-speed wire rod as the raw material; the three surfaces of every steel wire along the radial direction are provided with indentation; and the indentation on every two of the three surfaces mutually forms 120 degrees; the direction of the indentation on each surface along the radial direction is a diagonal direction in 45 degrees with an element line of the steel wire; in the indentation of the three surfaces, the direction of the indentation on one surface is opposite to the direction of the indentation on the other surfaces; and three steel wires with indentation are twisted into the steel strand. The 1*3I low-relaxation pre-stress indented steel strand has the advantages that the strength and the toughness of the steel strand are improved; the light circle steel wire indentation, in particular to the indentation on the three surfaces is in opposite direction, thus more improving the bond stress between the finished steel strand and the concrete; the stranded steel strand realizes the low-relaxation performance after being treated, is used for manufacturing pre-stress concrete slab sleepers for urban underground tracks (or tracks on the ground), improves the quality of the slab sleepers, and facilitates the trains to quickly and safely run.

Description

1 * 3I low relaxed prestress indented steel stranded wire

Technical field

The utility model relates to a kind of prestress wire, particularly relates to a kind of 1 * 3I low relaxed prestress indented steel stranded wire that high speed railway track does not have tiny fragments of stone, coal, etc. roadbed prestressed reinforced concrete tie plate that is used for.

Background technology

As everyone knows, reform and opening-up is over 30 years, along with fast development of national economy, urban construction is maked rapid progress, living standards of the people improve day by day, private car increases rapidly, agricultural population shifts to cities and towns, though the urban road mileage constantly increases, but road traffic is still more and more crowded, road congestion is serious, for solving the not smooth problem of urban road, must develop the underground rail traffic, adopt no tiny fragments of stone, coal, etc. roadbed, use the prestressed reinforced concrete tie plate, for guaranteeing prestressed reinforced concrete tie plate quality, the quality of the bond stress between its main arrangement of reinforcement and the concrete is the key factor of decision prestressed reinforced concrete tie plate quality, adopted single rule deforming steel wire in the past or had symmetrical indented wire as adapted master muscle in the concrete slab sleeper, bond stress between it and the concrete is less, and especially the former stress is concentrated seriously, and the quality of both concrete slab sleepers is all relatively poor.

Summary of the invention

Main purpose of the present utility model is to overcome above deficiency and a kind of 1 * 3I low relaxed prestress indented steel stranded wire that high speed railway track does not have tiny fragments of stone, coal, etc. roadbed prestressed reinforced concrete tie plate that is used for is provided.

The technical scheme that its technical problem that solves the utility model adopts is: it comprises compressor wire and steel strand, it is characterized in that: the compressor wire in the described steel strand is as raw material with the cold high-speed rolling wire rod of refining non-torsion control, every steel wire radially three has been worn indentation, three indentations are mutually 120 °, the plain line oblique line directions at 45 of the direction of indentation and steel wire vertically, indentation direction in three indentations is opposite with the indentation direction on two sides in addition, and three steel wires that have indentation 3 twist into steel strand.

The utility model can also adopt following technical measures:

Described steel wire 2 diameters are Φ 2.90-6.00mm;

Degree of depth a=0.06～the 0.10mm of indentation 3 on the described steel wire 2, length b=3.50 ± 0.50mm, the pitch L=5.50 ± 0.50mm of indentation (3);

The nominal diameter of described steel strand 1 is 6.20-12.90mm, and diameter deviation is+0.20mm--0.10mm that sectional area is 19.80-84.80mm ²

Advantage and the good effect that the utlity model has are: increased steel strand intensity and toughness, the round wire indentation especially direction of three indentations and three indentations more increases finished steel twisted wire and concrete bond stress on the contrary, steel strand behind the plying reach the underrelaxation performance after treatment, be used to make city underground (or ground) track prestressed reinforced concrete tie plate, improved the concrete slab sleeper quality, helped train and fast and safely travel.

Description of drawings

Fig. 1 is the amplification profile structural representation that three strands of steel wires twist into steel strand;

Fig. 2 is that steel wire is along the axis direction structural representation;

Fig. 3 is that steel wire A-A amplifies the sectional structure schematic diagram.

Among Fig. 1-Fig. 3: 1. steel strand, 2. steel wire, 3. indentation, 4. plain line.

The specific embodiment

For further understanding summary of the invention characteristics of the present utility model and effect following examples for example now, and conjunction with figs. is described in detail as follows, and sees also Fig. 1-Fig. 3.

As shown in Figure 1-Figure 3: the compressor wire 2 in the described steel strand 1 is as raw material with the cold high-speed rolling of refining non-torsion control (SWRH77B) wire rod, the steel wire 2 that every diameter is Φ 4.22mm (or Φ 2.90-6.00mm) radially three has been worn indentation 3, three indentations 3 are mutually 120 °, the degree of depth a=0.06 of indentation 3～0.10mm, length b=3.50 ± 0.50mm, the pitch L=5.50 of indentation 3 ± 0.50mm, the plain line 4 of the direction of indentation 3 and steel wire 2 oblique line directions at 45 vertically, indentation 3 direction in three indentations 3 are opposite with indentation 3 directions on two sides in addition, the tensile strength R of steel wire 2 _m〉=1860Mn, maximum, force F _m〉=26.43kN, elongation rate A (L ₀=100mm) 〉=2.5%, number of bends m 〉=4 time/180 ° (R=10mm); Three steel wires 2 that have indentation 3 twist into steel strand 1, and the nominal diameter of steel strand 1 is 9.10mm (or 6.20-12.90mm), and diameter deviation is+0.20mm--0.10mm that sectional area is 41.96mm ²(or 19.80-84.80mm ²), 1 * 3I low relaxed prestress indented steel stranded wire mechanical property, nominal tensile strength R _m〉=1860Mpa, the maximum, force of whole steel strand (disrumpent feelings load) F _m〉=78kN, regulation disproportional extension strength F _P0.2〉=70.5kN, maximum, force percentage of total elongation (L ₀=500mm) A _Gt〉=3.5%, yield tensile ratio F _P0.2/ F _m〉=90%, initial load is equivalent to 70% o'clock of nominal maximum, force, stress relaxation rate behind the 1000h≤2.5%.

Thereby strengthened indentation prestress wire 1 and concrete bond stress, increased the intensity of concrete slab sleeper, improved the quality of city underground rail, helped train and fast and safely travel.

Its advantage is: increased steel strand intensity and toughness, the round wire indentation especially direction of three indentations and three indentations more increases finished steel twisted wire and concrete bond stress on the contrary, steel strand behind the plying reach the underrelaxation performance after treatment, be used to make city underground (or ground) track prestressed reinforced concrete tie plate, improved the concrete slab sleeper quality, helped train and fast and safely travel.

Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. 1 * 3I low relaxed prestress indented steel stranded wire, it comprises compressor wire and steel strand, it is characterized in that: the compressor wire (2) in the described steel strand (1) is as raw material with the cold high-speed rolling wire rod of refining non-torsion control, described every steel wire (2) radially three has been worn indentation (3), three indentations (3) are mutually 120 °, the direction of indentation (3) is the plain line oblique line directions at 45 with steel wire (2) vertically, an indentation (3) direction is opposite with indentation (3) direction on other two sides in three indentations, and three steel wires (2) that have indentation (3) twist into steel strand (1).

2. 1 * 3I low relaxed prestress indented steel stranded wire according to claim 1 is characterized in that: described steel wire (2) diameter is Φ 2.90-6.00mm.

3. 1 * 3I low relaxed prestress indented steel stranded wire according to claim 1 is characterized in that: described steel wire (2) is gone up the degree of depth a=0.06～0.10mm of indentation (3), length b=3.50 ± 0.50mm, the pitch L=5.50 ± 0.50mm of indentation (3).

4. 1 * 3I low relaxed prestress indented steel stranded wire according to claim 1 is characterized in that: the nominal diameter of described steel strand (1) is 6.20-12.90mm, and diameter deviation is+0.20mm--0.10mm that sectional area is 19.80-84.80mm ²